Ceramics-Silikáty 56, (2) 152 - 158 (2012) |
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INTERCALATION OF METHYLENE BLUE INTO MONTMORILLONITE AT DIFFERENT CONDITIONS: AN APPROACH FOR PREPARING CLAY-BASED NANOPIGMENTS
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Validi Mazdak 1, Bazgir Saeed 2, Rashidi Abosaeed 1,
Yazdanshenas Mohammad Esmail 3
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1 Department of Textile Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
2 Department of Polymer Engineering, Science and Research Branch, Islamic Azad University, Tehran, Iran
3 Department of Textile Engineering, Yazd Branch, Islamic Azad University, Yazd, Iran
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Keywords: Montmorillonite, Intercalation, Cationic Exchange, Methylene blue, Nanopigment
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Intercalation products based on ionic exchange reaction between cationic dye methylene blue and Na+-montmorillonite were
prepared. Montmorillonite particles intercalated with methylene blue were characterized using X-ray diffraction, infrared
spectroscopy, elemental and thermo-gravimetric analysis. The results showed that intercalation of dye molecules within the
interlayer spaces of montmorillonite has successfully occurred and a degree of layers coverage equal to 81 % of cationic
exchange capacity was achieved. The obtained coverage results in an increase of 5.8 Å in the basal spacing of silicate
layers compared to pure montmorillonite. XRD results also indicated that the intercalation process was only dependant on
intercalant concentration. Other factors such as time of the process and clay concentration had no effect on the obtained
basal spacing. Thermo-gravimetric analysis suggested improved thermal stability of the intercalated dye. |
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